Stapling machine



Dec. 30, 1930. A. H. SCHMIDTKE 1,735,370

STAPLI NG MACHINE Filed Jan. 18, 1929 2 Sheets-Sheet l b T INVENTOR ilhrf ff. Jdzmz'dike ATTORNEY Dec. 30, 1930. A, H, SCHMIDTKE 1,186,870

STAPLING MACHINE Filed Jan. 18, 1929 2 Sheets-Sheet 2 g \\\\\\\\\\l mtfA L I [1V VLN TOR W rain/J A TTORNE rs Patented Dec. 30, 1930 UNITEDSTATES ALBERT H. SGHMIDTKE,

PATENT OFFICE OF ST. JOSEPH, MICHIGAN, ASSIGNOB TO ST. JOSEPH IRONWORKS, OF ST. JOSEPH, MICHIGAN STAPLTNG MACHINE Application filedJanuary 18, 1929. Serial No. 333,348.

This invention relates to improvements in stapling machines.

The object of the invention is to provide compensating means forstapling varying thicknesses of material automatically with outadjustment of the machine and to provide for relieving the machine ofstress when a staple is driven home.

Objects pertaining to details and economies of construction andoperation will appear from the description to follow. A preferredembodiment of my invention with separate modified forms as applied to astandard design of stapling machine is illustrated in theaccompanyingdrawing, in which:

Fig. 1 is a side perspective view of essential parts of a standarddesign of stapling machine with my improvements incorporated, the frontplate of the stapler being omitted.

Fig. 2 is an enlarged detail side elevation view of the staple formerand driver in the driving position.

Fig. 3 is a. similar enlarged detail vertical sectional view on a linecorresponding to line 33 of Fig. 1 showing my improved compensatingmeans in tripped position, the contactends of the staple driver andstaple former being at the same height and tripped to show the resultwhen extra thickness of board or material is encountered.

Fig. 4 is a detail view of a modified form of the toggle trip showing anindependent separate trip rod and means to strike the Work and aprojecting arm on the toggle to facilitate the tripping action, theparts being in initial position.

Fig. 5 is a detail elevation of the front of i a staple former anddriver of modified form with a simple latch retaining means and ayielding direct spring holding the staple driver and former yieldinglydownward after the tripping action has occurred, the parts being ininitial position.

The parts will be identified by their numerals of reference which arethe same in all the views.

1 is the frame of the machine. 2 isthe plunger for actuating thestapler. 3 is the cross head carrying the staple forming and drivingmeans. 4 represents the wire feed for the stapler which is actuated bythe dog 5 carried on the cross head 3 in a usual and Well-known-manner.6 is the wire that is being fed into the stapler. These parts are hereall shown in conventional form and are of a standard design for thepurpose.

7 is the outer staple forming member and support reciprocating insuitable vertical guides 8, 9 which guides are adjustable by the setscrews 10. The staple former is bifurcated at its lower end and adaptedto cut the wire and form the staple and sup-- port the same for drivingin the usual wellknown Way, only so much of this being shown as isnecessary, the central folding finger being entirely omitted and alsothe connection for operating the wire cutter.

11 is the staple driver adapted to reciprocate within the bifurcated endof the staple former 7 and is carried by a slide 12 which is providedwith a guide pin 121 secured thereto by cap screw; 13 is the guidesocket which is secured by adjusting nuts 131, 131 on the cross head 3in which guide pin 121 reciprocates. 14 are cars provided on the socket13 and 15 is a lug provided on the staple driver slide 12. The ear 14and. the lug 15 are connected by a toggle joint made up of links 16 and17 with a. hinge pin 18 therebetween. The toggle is held yieldingly inthe vertical position by spring 19 which connectshinge pin 18 to a lug20 on the cross head 3.

When the toggle is in the position indicated in Fig. 2 and the crosshead 3 is operated the staple is forcibly driven to its work so long asthe toggle is maintained in that position. When the staple is driven thetoggle is tripped so that the driving pressure on the staple is releasedand jambin of the work and undue strain is avoided. trip pin 21 issecured by bracket 22 to the staple forming member 7 and reciprocatesthrough the lug 15. It has a beveled contact end 211 disposed to hit thehinge pin 18 of the toggle and trip the same. Spring 212 is provided onthe trip pin 21 to hold the staple former yieldingly downward.

is completely driven.

The relative movement of the staple former 7 and the staple driver 12 issuch that just as the driver has forced the staple home in its work thetrip pin 21 contacts at its end 211 against the hinge pin 18 and tripsthe toggle releasing the pressure and avoiding any further stapledriving action and thus prevents jambing the staple driver into thematerial being worked upon and thereby avoiding injury of the same and,at the same time,- avoids any undue strain on the machine.

The position of the tripped staple driver is indicated in Fig. 3. Itwill thus be seen from this arrangement of the parts that the drivingconnection by the driving head 3 and the stapler is broken at the pointwhen the staple The staple driver is held yieldingly to its work byspring 23 to insure its prompt working when the cross head is raised.

In Fig. 5 I show a modification. The former 7 and the staple driver 11are the same and in the same relation as in the preferred form. Thestaple driver slide 12 is not provided with the guide pin but isprovided with a vertical slot 123 in which is disposed the guide pin 31on the cross head 3. A coil spring 32 is interposed between lug 33 onthe cross head 3 and lug 124 on the slide 12 to hold the same yieldinglydownward.

In place of the trip pin 21 I provide trip pin 24 secured by cap screw241 to the staple former member 7, the upper end being disposed to actupon the trip latch to release the staple driver at the right time. Iprovide a trip latch 25 pivoted at 251 to the cross head 3 and held toits work by spring 252, the same being notched at 253 to engage theupper end of the staple driver slide 12. A projecting trip pin 254 isprovided on latch 25 for actuation by the trip finger 24, all as seen inFig. 4.

This is a very simple form of my invention and operates veryeifectively.

In Fig. 4 I show a further modification, the former 7 and the driver 11being the same as before. The driver slide 12 is suitably guided on thecross head 3 and connected directly by pivot screw 125 to the lowertoggle 17 The upper-toggle 16' is pivoted at 34 to the cross head 3. Aprojectin trip finger 171 is on the toggle link 17'. n independent trippin 24 is supported in guide 242 carried by the slide 12 and is providedwith a stop collar 243 towards its upper end and a spring abutmentcollar 244 for spring 245 which holds the said pin yieldingly downward.The lower end of the pin 24 projects to the same height as the stapleformer 7 and is adapted to contact with the work being stapled. It issquare at its upper end and is of such length that it operates the tripfinger 171 and is timed to break the toggle when the staple iscompletely driven, thereby doing the same work in the same way as thetrip pin carried by the staple former, but entirely independent thereof.

26 indicates in each view the actuating latch for the staple former tohold it in position to cut the staple from the wire as it is fed along.As my invention does not pertain to this feature I have merelyillustrated the latch in the usual form and do not describe in detailits operation which is well-known to those skilled in the art.

It is clear that my stapling machine improvements can be greatlymodified. I, of course, prefer the toggle tripping means but it is clearthat a simple latch is sufiicient. While I have shown springs for urgingthe staple driver downward, it could be made of sufiicient weight todrop down and would drop down anyway, only its action would be ratherslow.

I desire, therefore, to claim the invention in the specific toggle formand also desire to claim the same broadly by whatever means the driveris returned to initial position or by whatever means it is locked andtripped as pointed out in the appended claims.

Having thus described my invention, what I claim as new and desire tosecure by Letters Patent, is:

1. In a stapling machine, the combination of the reciprocating driverhead, an adjustable socket piece secured thereto having laterallyprojecting ears, a staple driver, a staple driving slide plate having alaterally projecting lug and having a guide pin adapted to reciprocatein the said socket, a trip toggle connection between the ears and lug onsaid socket and slide plate, a spring to hold the toggle in actuatingposition, a staple former cooperating with the said staple driver, and aprojecting trip pin on said staple former timed to trip the said toggleconnection and release the pressure after a staple has been driven, asspecified.

2. In a stapling machine, the combination of the reciprocating driverhead, a staple driver, a trip toggle connection between saidreciprocating head and staple driver, a staple former cooperating withsaid driver to form and support the staple, and a trip pin on the stapleformer disposed and timed to contact with the said trip toggleconnection to trip the same to release the pressure when the staple isdriven home, as specified.

3. In a stapling machine, the combination of the reciprocating driverhead, a staple driver, a trip connection between said reciprocating headand staple driver, ar staple former cooperating with said driver to formand support the staple, and a trip pin on the staple former disposed andtimed to contact with the said trip connection to trip the same torelease the pressure when the staple is driven home, as specified.

4. In a stapling machine, the combination of the reciprocating driverhead, a staple driver, a trip tog 1e connection between saidreciprocating hea and staple driver, a staple former cooperating withsaid driver to form and support the staple, and a trip means dis-' posedand timed to contact with the said trip toggle connection to trip thesame to release the pressure when the staple is driven home, asspecified.

In witness whereof I have hereunto set my hand.

ALBERT H. SCHMIDTKE.

